[Discussion] 60FPS patches for PSP games that run at 30FPS

[Kabuto_Kun]

(05-22-2015 04:02 PM)chaoslordd Wrote:  would it be posible to patch phantasy star portable 2 from 20 fps (during multiplayer) to 30+?

edit: i found the adress but it seems that changing it speeds up the game (it s like using the alternative speed option from ppsspp).

With that info now I can help you. If the address you found makes the game run at 60 fps but at double speed, you can use the known speed modifiers to fix it:

Code:

_S ULUS-10529
_G Phantasy Star Portable 2 [USA]
_C0 Speed x1 (Default)
_L 0x20002000 0x3C013F80
_L 0x20002004 0x0A2BD232
_L 0x20002008 0x4481A000
_L 0x2021CDD4 0x0E200800
_C0 Speed x0.5 (use at 60fps)
_L 0x20002000 0x3C013F00
_L 0x20002004 0x0A2BD232
_L 0x20002008 0x4481A000
_L 0x2021CDD4 0x0E200800

Using the 0.5 speed modifier will correct the game speed. You can see that the first line from each cheat is the only difference between them (floats, 3F80 = 1.0, 3F00 = 0.5). According to your test, phantasy star 2 has variable fps, it should be easy to track what addresses are changing the game speed using cheat engine (using my "easy" guide as a start), in case the cheat above does not work. I am pretty sure that you can find the same addresses with the INFINITY version or even with the first game, just search for the default value (3C013F80 hex) with cheat engine. Let me know your progress.